Amanita muscaria, commonly known as the Fly Agaric is a poisonous and pschoactive basidiomycete fungus, one of many in the genus Amanita. Native throughout the temperate and boreal regions of the Northern Hemisphere,the Fly Agaric has been unintentionally introduced to many countries in the Southern Hemisphere, generally as a symbiont with pine plantations, and is now a true cosmopolitan species. It associates with various deciduous and coniferous trees.
Var. guessowii is yellow to orange, with center of cap more orange or reddish orange than the outer part. It is found throughout North America, but is most common in northeastern North America, from Newfoundland and Quebec down to Tennessee. Some authorities treat these populations as part of A. muscaria var. formosa, while others recognize it as a distinct variety.
Source: en.wikipedia.org/wiki/Amanita_muscaria - 15.06.2010
Yellow Fly Agaric
The Fly Agaric – red with white spots – in Germany is known with every child. The yellow subspecies however looks uncommon with us. It is native in a few regions of North America.